Aerial grade clamp



Mrch 31, 1931. f W` 5 R|HARD5QN 1,798,223

AERTAI. GRADE GLMP Filed July 3, 1930 @xmxmk u fbi-f* Patented Mar. 31., 1931 ears WARREN SPENCER RECHARDSGN, @TE

CHARLOTTE, GFUOLEML ASSG'NOR OF @NE-HALF ZO 'FRANK L. RAY, 0F .lVECK'L-ENBUJRJG COUNTY, NORTH CAR-OLNA AEREAL GRADE CLATYIP Application filed July 3, 1930. Serial No. 465,737.

The object of my invention is to provide a novel aerial clamp for supporting telephonetelegraph cables; and to provide a novel combination oic elements and to increase the elidciency in a device oi' this kind.

attain these and other objects of my invention by the device illustrated in the accompanying drawings, in which- Figure 1 is a side elevation of my invention in use;

2 is an end elevation oi same; and

Fig. 8 is a perspective view ot the several members oi the device (except the bolts), detached and shown in perspective.V

Lilie numerals designate like parts in each ot the several views.

je'ierrinlr to the accompanying drawings., l provide a plate 5 having a curved or semicylinorical portion 6 to receive a telegraph or telephone cable C. The plate 5 is provided with a rib Z and a parallel groove 8 to receive a. supporting cable S. 9 designates the upper edge of the plate. The lower portion ot the plate is provided with vertical elongated bolt slots 12, and the upper portion of the plate is provided with elongatel bolt slots 1G and a central opening 11. e

l provide an opposed plate 13 having a curved or semi-cylindrical portion 1e disposed opposite the portion 6 to enga-ge around the telephone-telegraph cable C. l also provide a tongue 15 adapted to be inserted through the slot 11 0i plate rlongue 16 is provided with an upwardly turned end or edge portion 17, as shown in 3. 15 designates the edge portions off the plate 13 which abut against the opposed plate 5, as shown in Fig. 2. l alsoV provide vertical elongated slots 18 in the lower portion oi plate 13.

l. provide an upper plate member 19 having a groove 20 suitably positioned to receive the rib .7 ot plate 5. l also provide a groove 21 suitably positioned to oppose the corresponding groove 8 in plate 5 and to receive the supporting cable S. l also provide top flange or cover member 22 disposed at right angles to the bottom of the plate 19. l also provide elongated slots 28 corresponding in position with the slots 10 ot plate I also provide suitable short bolts 24 and nuts 25 to tasten plate 19 to plate 5, and plate 13 to plate 5,

shown in Figs. 1 and 2.

rlhe operation of the device will be obvious trom an examination of Figs. 1 and 2 ot' drawings. The curved portions 6 and 1-1 oi' plates 5 and 13 function to support the j ephone or telegraph cable C, tongue 16 of Hne plate 18 being inserted through the slot 11 plate 5, and the plates being adjustably bolted together by reason of the elongated shape oi' the slots 12 and 18. rllie plate 19 is similarly bolted to the upper portion of plato 5 and the grooves 8 and 21 cooperate to hold the supporting cable S. The rib 7 vseats in the-groove 20, as shown in Fig. 2, and the lange 22 overlaps the edge 9 oi main plate 5.

lt is of course within the contemplation ot my invention to make the cable clamp of any suitable size and ci any suitable material, preferably of suitable iron material.

A diiiiculty with clamps heretofore devised is that when the bolts are tightened enough to hold the messenger cable, it also tightens to the same degree the part of the'clainp holding the lead cable. rlhi's causes a pressure that injures an'l flattens the telephone or telegraph cable, which consists of a number' ot small wires covered with sott lead. Only -a slight pressure on the lead cable would ingure it.

My device permits of independent adjustment of the portion ot the clamp engaging the supporting cable and the portion of the clamp engaging the telephone cable.v This results in important improvement;

llhat l claim is:

1. lin an aerial grade clamp, the combination ot a mainplate having a curved portion to receive a telephone-telegraph cable, and having a groove to receive a supporting cable, and having a slot tol receive a tongue member, an opposed lower clamp plate having a curved porti-on adapted to engage the telephonetelegraph cable and having a tongue insertable through the slot in the main plate, and a third plate having a groove to receive the supporting cable and having a cover element eX- tending past the upper edge portion of the main plate, each ot the aforesaid elements having opposed slots for fastening members, and adjustable fastening members.

2. ln an aerial grade clamp, the combina tion of main plate having a curved portion to receive a telephone-telegraph cable, and having a groove to receive a supporting cable, and ha ing a slot to receive a tongue member, an opposed lower clamp plate having a curved portion adapted to engage the telephone-telegraph cable having a tongue insertable through the slot in the main plate, and a third plate having av groove to receive the supporting cable and having a cover element extending past the upper edge portion of the main plate, each of the aforesaid elements having opposed elongated slots for fastening members, and ustable fastening members.

3. n an aerial grade clamp, the combination of a main plate having a curved portion to receive a telephone-telegraph cable, and having a groove to receive a supporting cable, and having slot to receive a tongue member, an opposed lower clamp plate having a curved portion adapted to engage the telephone-telegraph cable and having a tongue insertable through the slot in the main plate, said tongue having an upwardly turned end portion, and a third plate having a groove to receive the supporting cable and having a cover element extending past the upper edge portion of the main plate, each of the aforesaid elements having opposed elongated slots for fastening members, and adjustable fastening members.

et. In an aerial grade clamp, the combination of a main plate having a curved portion to receive telephone-telegraph cable, and having' a groove to receive a supporting Cable, and having a slot to receive a tongue member, the main plate having a rib -disposed above the aforesaid slot and parallel with the groove for the supporting cable, an opposed lower clamp plate having a curved porti-on adapted to engage the telephone-telegraph cable and having a tongue insertable through the slot in the main plate, an-d a third plate having a groove to receive the supporting cable, and having a groove parallel with the groove for receiving the supporting cable, said groove being disposed opposite the rib of the main plate to receive same, each of the aforesaid elements having opposed elongated slots for fastening members, and adjustable fastening members.

5. In an aerial .grade clamp, the combination of a main plate having a curved portion to receive a telephone-telegraph cable, and having a groove to receive a supporting cable, and having a slot to receive a tongue member, the main plate having a rib disposed above the aforesaid slot and parallel With the groove for the supporting cable, an opposed lower clamp plate having a curved portion adapted to engage the telephone-telegraph cable and having a tongue insertable through the slot in the main plate, and a third plate having a bers, and adjustable fastening members.

WARREN SPENCER RICHARDSON. 

